<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
      <el-row :gutter="20">
        <!-- 搜索input框 -->
        <el-col :span="8">
          <el-input placeholder="请输入内容" v-model="queryInfo.query" clearable @clear="getGoodList">
            <el-button slot="append" icon="el-icon-search" @click="getGoodList"></el-button>
          </el-input>
        </el-col>
        <!-- 添加商品按钮 -->
        <el-col :span="4">
          <el-button type="primary" @click="goAddpage">添加商品</el-button>
        </el-col>
      </el-row>
      <!-- 商品表格 -->
      <el-table :data="goodslist" border stripe>
        <el-table-column label="#" type="index"></el-table-column>
        <el-table-column label="商品名称" prop="goods_name"></el-table-column>
        <el-table-column label="商品价格(元)" prop="goods_price" width="95px"></el-table-column>
        <el-table-column label="商品重量" prop="goods_weight" width="95px"></el-table-column>
        <el-table-column label="创建时间" prop="add_time" width="140px">
            <!-- 调用时间过滤器渲染时间 -->
            <template slot-scope="scope">
                {{scope.row.add_time | dateFormat}}
            </template>
        </el-table-column>
        <el-table-column label="操作" width="125px">
          <template slot-scope="scope">
            <!-- 编辑按钮 -->
            <el-button size="mini" type="primary" icon="el-icon-edit"></el-button>
            <!-- 删除按钮 -->
            <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeById(scope.row.goods_id)"></el-button>
          </template>
        </el-table-column>
      </el-table>
      <!-- 分页区域 -->
      <el-pagination
      @size-change="handleSizeChange"
      @current-change="handleCurrentChange"
      :current-page="queryInfo.pagenum"
      :page-sizes="[1, 2, 3, 4, 5, 10]"
      :page-size="queryInfo.pagesize"
      layout="total, sizes, prev, pager, next, jumper"
      :total="total">
      </el-pagination>
    </el-card>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 查询数据的参数
      queryInfo: {
        query: '',
        pagenum: 1,
        pagesize: 10,
      },
      // 商品列表数据
      goodslist: [],
      // 总数据条数
      total: 0,
    }
  },
  //页面初始化钩子函数
  created() {
    this.getGoodList()
  },
  methods: {
    // 获取商品列表数据
    async getGoodList() {
      const { data: res } = await this.$http.get('goods', {
        params: this.queryInfo,
      })
      if (res.meta.status !== 200) return this.$message.error('获取商品数据失败')
      this.goodslist = res.data.goods
      this.total = res.data.total
    },
    // 每页展示条数发生变化触发
    handleSizeChange(newSize){
      this.queryInfo.pagesize = newSize
      this.getGoodList()
    },
    // 当前展示的页码值发生变化 
    handleCurrentChange(newNum){
      this.queryInfo.pagenum = newNum
      this.getGoodList()
    },
    // 删除商品数据
    async removeById(id){
      const confirmResult = await this.$confirm('此操作将永久删除该商品数据, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)
      if(confirmResult!='confirm') {
        return this.$message.info('已取消删除')
      }
      // 调接口删除数据
      const{data:res} = await this.$http.delete('goods/' + id)
      if(res.meta.status!==200) return this.$message.error('删除商品数据失败')
      this.$message.success('删除商品数据成功')
      this.getGoodList()
    },
    // 点击添加商品跳转相应页面
    goAddpage(){
      this.$router.push('/goods/add')
    }
  },
}
</script>

<style lang="less" scoped>
.el-pagination{
  margin-top: 10px   ;
}
</style>